<template>
	<view class="content">
		<view class="navbar" :style="{position:headerPosition,top:headerTop}">
			<view class="nav-item" :class="{current: sidx === 'sort_order'}" @click="tabClick('sort_order')">
				综合排序
			</view>
			<view class="nav-item" :class="{current: sidx === 'sell_volume'}" @click="tabClick('sell_volume')">
				销量优先
			</view>
			<view class="nav-item" :class="{current: sidx === 'retail_price'}" @click="tabClick('retail_price')">
				<text>价格</text>
				<view class="p-box">
					<text :class="{active: order == 'asc' && sidx === 'retail_price'}" class="zzhicon icon-shang"></text>
					<text :class="{active: order == 'desc' && sidx === 'retail_price'}" class="zzhicon icon-shang xia"></text>
				</view>
			</view>
			<text class="cate-item zzhicon icon-fenlei" @click="toggleCateMask('show')"></text>
		</view>
		<view class="goods-list">
			<view v-for="(item, index) in goodsList" :key="index" class="goods-item" @click="navToDetailPage(item.id)">
				<view class="image-wrapper">
					<image :src="item.listPicUrl" mode="aspectFill"></image>
				</view>
				<text class="title clamp">{{item.name}}</text>
				<view class="price-box">
					<text class="price">{{item.retailPrice}}</text>
					<text>已售 {{item.sellVolume}}</text>
				</view>
			</view>
		</view>
		<uni-load-more :status="loadingType"></uni-load-more>

		<view class="cate-mask" :class="cateMaskState===0 ? 'none' : cateMaskState===1 ? 'show' : ''" @click="toggleCateMask">
			<view class="cate-content" @click.stop.prevent="stopPrevent" @touchmove.stop.prevent="stopPrevent">
				<scroll-view scroll-y class="cate-list">
					<view>
						<view class="cate-item b-b two">{{parentCategory.name}}</view>
						<view v-for="item in cateList" :key="item.id" class="cate-item b-b" :class="{active: item.id==id}" @click="changeCate(item.id)">
							{{item.name}}
						</view>
					</view>
				</scroll-view>
			</view>
		</view>

	</view>
</template>

<script>
	import uniLoadMore from '@/components/uni-load-more/uni-load-more.vue';
	export default {
		components: {
			uniLoadMore
		},
		data() {
			return {
				cateMaskState: 0, //分类面板展开状态
				headerPosition: "fixed",
				headerTop: "0px",
				loadingType: 'more', //加载更多状态
				cateList: [],
				goodsList: [],
				currentCategory: {
					name: ''
				},
				parentCategory: {
					name: ''
				},
				id: 0, //二级分类id
				sidx: "sort_order", //sort_order,sell_volume,retail_price
				order: "desc",
				page: 1,
				limit: 10,
			};
		},
		onLoad(options) {
			if (options.id) {
				this.id = options.id;
				this.getCategoryInfo();
			} else {
				this.getSecondCategory();
			}
		},
		onReady() {
			// #ifdef H5
			this.headerTop = `${document.getElementsByTagName('uni-page-head')[0].offsetHeight}px`;
			// #endif
		},
		onPageScroll(e) {
			//兼容iOS端下拉时顶部漂移
			if (e.scrollTop >= 0) {
				this.headerPosition = "fixed";
			} else {
				this.headerPosition = "absolute";
			}
		},
		//下拉刷新
		onPullDownRefresh() {
			this.page = 1;
			this.getGoodsList('refresh');
		},
		//加载更多
		onReachBottom() {
			this.page++
			this.getGoodsList();
		},
		methods: {
			//获取分类信息
			getCategoryInfo() {
				const that = this;
				that.$http.ajax({
					url: that.$http.adornUrl(that.$api.catalogCategory),
					data: {
						id: that.id
					},
					showLoad: true
				}).then(function(data) {
					if (data.code == 0) {
						that.cateList = data.brotherCategory;
						that.currentCategory = data.currentCategory;
						that.parentCategory = data.parentCategory;
						that.getGoodsList();
					}
				})
			},
			//获取商品列表
			getGoodsList(type = 'add', loading) {
				const that = this;
				that.loadingType = 'loading'
				that.$http.ajax({
					url: that.$http.adornUrl(that.$api.goodsList),
					data: {
						categoryId: that.id,
						sidx: that.sidx,
						order: that.order,
						page: that.page,
						limit: that.limit,
					},
					showLoad: true
				}).then(function(data) {
					if (data.code == 0) {
						if (type === 'add') {
							that.goodsList = that.goodsList.concat(data.data.list);
							if (data.data.list.length < that.limit) {
								that.loadingType = 'nomore'
							} else {
								that.loadingType = 'more'
							}
						} else {
							that.goodsList = data.data.list
							that.loadingType = 'more'
							if (loading == 1) {
								uni.hideLoading()
							} else {
								uni.stopPullDownRefresh();
							}
						}
					}
				})
			},
			//筛选点击
			tabClick(sidx) {
				this.sidx = sidx
				this.page = 1
				if (sidx == 'retail_price') {
					this.order = (this.order == 'desc' ? 'asc' : 'desc')
				} else {
					this.order = 'desc'
				}
				uni.pageScrollTo({
					duration: 300,
					scrollTop: 0
				})
				uni.showLoading({
					title: '正在加载'
				})
				this.getGoodsList('refresh', 1);
			},
			//显示分类面板
			toggleCateMask(type) {
				let timer = type === 'show' ? 10 : 300;
				let state = type === 'show' ? 1 : 0;
				this.cateMaskState = 2;
				setTimeout(() => {
					this.cateMaskState = state;
				}, timer)
			},
			//分类点击
			changeCate(id) {
				if (this.id == id) {
					return false;
				}
				this.id = id;
				this.page = 1;
				this.toggleCateMask();
				uni.pageScrollTo({
					duration: 300,
					scrollTop: 0
				})
				uni.showLoading({
					title: '正在加载'
				})
				this.getGoodsList('refresh', 1);
			},
			//获取二级分类信息
			getSecondCategory() {
				const that = this;
				that.$http.ajax({
					url: that.$http.adornUrl(that.$api.getSecondCategory),
					showLoad: true
				}).then(function(data) {
					if (data.code == 0) {
						that.id = data.data[0].id
						that.getCategoryInfo()
					}
				})
			},
			//路由商品详情页
			navToDetailPage(id) {
				uni.navigateTo({
					url: `/pages/goods/goods?id=${id}`
				})
			},
			stopPrevent() {}
		},
	}
</script>

<style lang="scss">
	page,
	.content {
		background: $page-color-base;
	}

	.content {
		padding-top: 96upx;
	}

	.navbar {
		position: fixed;
		left: 0;
		top: var(--window-top);
		display: flex;
		width: 100%;
		height: 80upx;
		background: #fff;
		box-shadow: 0 2upx 10upx rgba(0, 0, 0, .06);
		z-index: 10;

		.nav-item {
			flex: 1;
			display: flex;
			justify-content: center;
			align-items: center;
			height: 100%;
			font-size: 30upx;
			color: $font-color-dark;
			position: relative;

			&.current {
				color: $base-color;

				&:after {
					content: '';
					position: absolute;
					left: 50%;
					bottom: 0;
					transform: translateX(-50%);
					width: 120upx;
					height: 0;
					border-bottom: 4upx solid $base-color;
				}
			}
		}

		.p-box {
			display: flex;
			flex-direction: column;

			.zzhicon {
				display: flex;
				align-items: center;
				justify-content: center;
				width: 30upx;
				height: 14upx;
				line-height: 1;
				margin-left: 4upx;
				font-size: 26upx;
				color: #888;

				&.active {
					color: $base-color;
				}
			}

			.xia {
				transform: scaleY(-1);
			}
		}

		.cate-item {
			display: flex;
			justify-content: center;
			align-items: center;
			height: 100%;
			width: 80upx;
			position: relative;
			font-size: 44upx;

			&:after {
				content: '';
				position: absolute;
				left: 0;
				top: 50%;
				transform: translateY(-50%);
				border-left: 1px solid #ddd;
				width: 0;
				height: 36upx;
			}
		}
	}

	/* 分类 */
	.cate-mask {
		position: fixed;
		left: 0;
		top: var(--window-top);
		bottom: 0;
		width: 100%;
		background: rgba(0, 0, 0, 0);
		z-index: 95;
		transition: .3s;

		.cate-content {
			width: 630upx;
			height: 100%;
			background: #fff;
			float: right;
			transform: translateX(100%);
			transition: .3s;
		}

		&.none {
			display: none;
		}

		&.show {
			background: rgba(0, 0, 0, .4);

			.cate-content {
				transform: translateX(0);
			}
		}
	}

	.cate-list {
		display: flex;
		flex-direction: column;
		height: 100%;

		.cate-item {
			display: flex;
			align-items: center;
			height: 90upx;
			padding-left: 30upx;
			font-size: 28upx;
			color: #555;
			position: relative;
		}

		.two {
			height: 64upx;
			color: #303133;
			font-size: 30upx;
			background: #f8f8f8;
		}

		.active {
			color: $base-color;
		}
	}

	/* 商品列表 */
	.goods-list {
		display: flex;
		flex-wrap: wrap;
		padding: 0 30upx;
		background: #fff;

		.goods-item {
			display: flex;
			flex-direction: column;
			width: 48%;
			padding-bottom: 40upx;

			&:nth-child(2n+1) {
				margin-right: 4%;
			}
		}

		.image-wrapper {
			width: 100%;
			height: 330upx;
			border-radius: 3px;
			overflow: hidden;

			image {
				width: 100%;
				height: 100%;
				opacity: 1;
			}
		}

		.title {
			font-size: $font-lg;
			color: $font-color-dark;
			line-height: 80upx;
		}

		.price-box {
			display: flex;
			align-items: center;
			justify-content: space-between;
			padding-right: 10upx;
			font-size: 24upx;
			color: $font-color-light;
		}

		.price {
			font-size: $font-lg;
			color: $uni-color-primary;
			line-height: 1;

			&:before {
				content: '￥';
				font-size: 26upx;
			}
		}
	}
</style>
